Package org.springframework.data.keyvalue.core

Class AbstractKeyValueAdapter

java.lang.Object

org.springframework.data.keyvalue.core.AbstractKeyValueAdapter

All Implemented Interfaces:

DisposableBean, KeyValueAdapter

Direct Known Subclasses:

MapKeyValueAdapter

public abstract class AbstractKeyValueAdapter
extends Object
implements KeyValueAdapter

Base implementation of KeyValueAdapter holds QueryEngine to delegate find and count execution to.

Author:

Christoph Strobl, Mark Paluch

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	AbstractKeyValueAdapter()	Creates new AbstractKeyValueAdapter with using the default query engine.
protected	AbstractKeyValueAdapter(QueryEngine<? extends KeyValueAdapter,?,?> engine)	Creates new AbstractKeyValueAdapter with using the default query engine.
protected	AbstractKeyValueAdapter(SortAccessor<Comparator<?>> sortAccessor)	Creates new AbstractKeyValueAdapter with using the default query engine and provided comparator for sorting.

Method Summary

Modifier and Type	Method	Description
long	count(KeyValueQuery<?> query, String keyspace)	Count all matching objects within keyspace.
<T> T	delete(Object id, String keyspace, Class<T> type)	Delete and return the object with given type and id.
Collection<?>	find(KeyValueQuery<?> query, String keyspace)	Find all matching objects within keyspace.
<T> Iterable<T>	find(KeyValueQuery<?> query, String keyspace, Class<T> type)
<T> T	get(Object id, String keyspace, Class<T> type)	Get the object with given id from keyspace.
protected QueryEngine<? extends KeyValueAdapter,?,?>	getQueryEngine()	Get the QueryEngine used.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.springframework.beans.factory.DisposableBean

destroy

Methods inherited from interface org.springframework.data.keyvalue.core.KeyValueAdapter

clear, contains, count, delete, deleteAllOf, entries, entries, exists, get, getAllOf, getAllOf, put

Constructor Details

AbstractKeyValueAdapter

protected AbstractKeyValueAdapter()

Creates new AbstractKeyValueAdapter with using the default query engine.

AbstractKeyValueAdapter

protected AbstractKeyValueAdapter(SortAccessor<Comparator<?>> sortAccessor)

Creates new AbstractKeyValueAdapter with using the default query engine and provided comparator for sorting.

Parameters:

sortAccessor - must not be null.

Since:

3.1.10

AbstractKeyValueAdapter

protected AbstractKeyValueAdapter(@Nullable
 QueryEngine<? extends KeyValueAdapter,?,?> engine)

Creates new AbstractKeyValueAdapter with using the default query engine.

Parameters:

engine - will be defaulted to SpelQueryEngine if null.

Method Details

getQueryEngine

protected QueryEngine<? extends KeyValueAdapter,?,?> getQueryEngine()

Get the QueryEngine used.

Returns:

get

@Nullable
public <T> T get(Object id,
 String keyspace,
 Class<T> type)

Description copied from interface: KeyValueAdapter

Get the object with given id from keyspace.

Specified by:

get in interface KeyValueAdapter

Parameters:

id - must not be null.

keyspace - must not be null.

type - must not be null.

Returns:

null in case no matching item exists.

delete

@Nullable
public <T> T delete(Object id,
 String keyspace,
 Class<T> type)

Description copied from interface: KeyValueAdapter

Delete and return the object with given type and id.

Specified by:

delete in interface KeyValueAdapter

Parameters:

id - must not be null.

keyspace - must not be null.

type - must not be null.

Returns:

null if object could not be found

find

public <T> Iterable<T> find(KeyValueQuery<?> query,
 String keyspace,
 Class<T> type)

Specified by:

find in interface KeyValueAdapter

Parameters:

query - must not be null.

keyspace - must not be null.

type - must not be null.

Returns:

empty Collection if no match found.

find

public Collection<?> find(KeyValueQuery<?> query,
 String keyspace)

Description copied from interface: KeyValueAdapter

Find all matching objects within keyspace.

Specified by:

find in interface KeyValueAdapter

Parameters:

query - must not be null.

keyspace - must not be null.

Returns:

empty Collection if no match found.

count

public long count(KeyValueQuery<?> query,
 String keyspace)

Description copied from interface: KeyValueAdapter

Count all matching objects within keyspace.

Specified by:

count in interface KeyValueAdapter

Parameters:

query - must not be null.

keyspace - must not be null.

Returns: